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MEDIUM severity

CVE-2023-26491 — rsshub

MEDIUMFix: DIYgod/RSSHub@c910c4d

CVE-2023-26491 is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in rsshub. A fix is available for rsshub — see the affected versions and patch details below.

RSSHub is vulnerable to cross-site scripting (XSS) via unvalidated URL parameters

Also known asGHSA-32gr-4cq6-5w5q
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2023-26491.

EPSS Exploitation Probability

via FIRST.org ↗
0.4%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs38th percentile — riskier than 38% of all scored CVEsHighest risk
0.00%0.45%0.89%1.34%0.8%0.4%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

1other npm packages depend on this — each one inherits the vulnerability until it's patched upstream
rsshubnpm
21Kdownloads / week

Description

RSSHub is an open source and extensible RSS feed generator. When the URL parameters contain certain special characters, it returns an error page that does not properly handle XSS vulnerabilities, allowing for the execution of arbitrary JavaScript code. Users who access the deliberately constructed URL are affected. This vulnerability was fixed in version c910c4d28717fb860fbe064736641f379fab2c91. Please upgrade to this or a later version, there are no known workarounds.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmrsshuball versions1.0.0-master.c910c4dnpm install rsshub@1.0.0-master.c910c4d

Affected Products

1 product · 1 configurations
Application
rsshubrsshub
< 2023-03-02
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for rsshub, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update rsshub to 1.0.0-master.c910c4d or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-26491 is resolved across your whole dependency graph.

  3. Workarounds

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

RSSHub is an open source and extensible RSS feed generator. When the URL parameters contain certain special characters, it returns an error page that does not properly handle XSS vulnerabilities, allowing for the execution of arbitrary JavaScript code. Users who access the deliberately constructed URL are affected. This vulnerability was fixed in version c910c4d28717fb860fbe064736641f379fab2c91. Please upgrade to this or a later version, there are no known workarounds.
O3 Security · Impact-Aware SCA

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CVE-2023-26491: rsshub XSS — Fix Available